Please check out Lyme disease. Many people with Lyme disease have these issues. You need an LLMD though. do not go through your regular doctor, as they do not know how to treat Lyme disease.
I have felt this way for 8 years, just like you explain!!!
Have you TSH, TPOab, Tgab, T4, reverse T4 , T4 free, T3, T3 free, reverse T# checked..
It could possibly be the thyroid....
But don't stop at one doc, look up hashimotos or underactive thyroid...
This is what it sounds like...
http://www.realthyroidhelp.com/
ANd this is the best
site...http://www.stopthethyroidmadness.com/
Also check out
http://www.mayoclinic.com/health/hashimotos-disease/ds00567
Just a quick note to say hi! You may have an eye/vision problem. Try an eye patch over one eye for a couple days and then the other eye for a couple days. I had almost the same symptoms and just figured out it is a malfuntioning eye causing motion-sickness symptoms which undiagnosed for decades led to anxiety. Try Eye Care forem.
Just a quick note to say hi! Have you read "The Yeast Connection" by Dr. William Crook- it might be your answer